SEC-1570 - Remove codecov badge

Author: Renato Quinhoneiro Todorov

README.md

@@ -1,4 +1,4 @@
-# GoEngine [![GitHub][license-img]][license] [![GoDoc][doc-img]][doc] [![Build Status][ci-img]][ci] [![Code Coverage][cov-img]][cov] [![Go Report Card][go-report-img]][go-report]
+# GoEngine [![GitHub][license-img]][license] [![GoDoc][doc-img]][doc] [![Build Status][ci-img]][ci] [![Go Report Card][go-report-img]][go-report]
 
 GoEngine is an Event Sourcing library written for GoLang.
 
@@ -45,7 +45,6 @@ Details are in the [contribution guide](CONTRIBUTING.md) and the [code of conduc
 [ci-img]: https://travis-ci.org/hellofresh/goengine.svg?branch=master
 [ci]: https://travis-ci.org/hellofresh/goengine
 [cov-img]: https://img.shields.io/codecov/c/github/hellofresh/goengine.svg
-[cov]: https://codecov.io/gh/hellofresh/goengine
 [license-img]: https://img.shields.io/github/license/hellofresh/goengine.svg?style=flat
 [license]: LICENSE
 [go-report-img]:https://goreportcard.com/badge/github.com/hellofresh/goengine